Speed Queen gas dryer model AGM459L with s/n S654332202C

[Thorning]

The above dryer was sold to a customer as a  used machine about 8 months ago. It was in proper operating condition at that time . A few days ago I rec'd a call that is was not producing heat. The customer was also a friend and I went to the house and quickly identified the problem in that the 2 prong solenoid coil was not working. I replaced the coil and it was once again producing heat . While I was observing the burner I noted that the flame was extending back from the normal tip almost to the gas valve. I dont consider this normal and not sure if this is something other techs have seen and I should change out the complete gas valve. Comments are invited.

[Pnwdad1981]

I’ve seen that with lack of airflow also they come with NCG orifaces, maybe their on LPG and need a different oriface?

[Thorning]

Orifice is correct. I am awaiting a call back on this unit  . It may never happen.

[Dash]

Are you saying the "dragon's breath" burner flame was not being drawn up the flame duct and instead was flaming back towards to burner valve?  If so, you've got an air flow problem.  Either a duct in the dryer or vent is blocked or the blower wheel is loose or stripped thus not turning at full speed.

[Thorning]

I am still awaiting a call from this owner but so far they have not called me to come back to work on it.